Abstract #0101

Prospective Motion Correction With NMR Markers Using Only Native Sequence Elements

Alexander Aranovitch¹, Maximilian Haeberlin¹, Simon Gross¹, Thomas Schmid¹, and Klaas Paul Pruessmann¹

¹Institute for Biomedical Engineering, ETH Zurich and University of Zurich, Zurich, Switzerland

A field-detection based method for prospective motion correction is proposed which uses the sequence itself for localizing NMR field probes. No additional gradients or increase of the sequence duration are required to apply this method to various MR sequences, such as clinically relevant spin-warp sequences. The proposed method collects high-frequency information present due to gradient switching from multiple short, temporally separated snippets within one TR. A precision on the order of 10µm and 0.01° (RMS) for translational and rotational degrees of freedom is obtained. The method is demonstrated in-vivo with high-resolution T2*-weighted gradient echo scans.

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